Badviber 

The opposite of a Goodviber, is a person who always think negative, even in good situations

Jim: "Hey Karen, let's go for a walk in the woods!"
Karen: "No Jim, it will rain soon"
Jim: "Ohh Karen, you're a Badviber for real!, enjoy your life for one time!"

Badviber by anonymous September 6, 2023

badvibe 

to worsen a person's mood; to annoy; to displease; to make weary; to cause discomfort or distress; to cheapen the mood or atmosphere; to give off a bad vibe

Using "badvibe" in a conversation:
A: OMG, the hardcover for A Dance with Dragons is on sale right now over at amazon.ca
B: It says pre-order... Learn to read, man... MAN!!! Wasting my time!
A: Stop breathing so loud... You're badvibing me, bitch!

badvibe by quachmin June 22, 2011